(1)KH-550 silane coupling agent

①Alias: 3 triethoxysilylpropylamine; AMEO

CAS : 919-30-2

Colorless or very pale yellow transparent liquid. It is soluble in organic solvents, but acetone and carbon tetrachloride are not suitable as diluents. It is soluble in water and hydrolyzes in water. The amino functional silane is basic, has high reactivity, and is highly versatile. The silicon portion of the molecule can provide a strong bond to the substrate. The main amine functional group can react with a variety of thermosetting resins, thermoplastic plastics, and synthetic rubber materials.

②Chemical formula or molecular formula and structural formula: C9H23NO3Si; NH2CH2CH2CH2Si (OC2H5) 3. Structural formula:

③Physical and chemical properties and quality indicators 

Melting point: -70℃

Boiling point: 217℃

Flash point: 104℃

Density: 0.946g/cm3

Refractive index: 1.4205

Content: ≥97%

Main application

It is mainly used in the following aspects.

a.Glass fiber reinforcement 

can greatly improve the flexural strength, tensile strength and interlaminar shear strength under wet and dry conditions, and significantly improve the wet electrical performance. When this silane coupling agent is used in both dry and wet conditions, the flexural and tensile strength of glass fiber reinforced thermoplastics, polyamides, polyesters and polycarbonates increases before and after immersion in water.

b.Adhesives and sealants

It is an excellent adhesion accelerator, which can improve the dispersion of pigments and increase the adhesion to glass, aluminum and steel.

c.Fiberglass and mineral insulation materials

Adding phenolic resin adhesive can improve moisture resistance and resilience after compression

d.Mineral fillers and resin systems

It can greatly improve the physical, mechanical and electrical properties of thermoplastic and thermosetting resins such as phenolic resin, polyester resin, epoxy, polyurethane and polycarbonate filled with inorganic fillers, and improve the wettability and dispersion of fillers in polymers.

e.Casting applications

It can improve the adhesion of phenolic adhesive and casting sand. It is helpful to improve the adhesion and water resistance of wear-resistant self-hardening sand and phenolic adhesive.

f.Metal surface treatment

After pretreatment of aluminum surface with 5% KH-550 ethanol solution, the tensile shear strength of aluminum-aluminum bonding with epoxy adhesive can be increased by 19.5%. KH-550 solution is chemically bonded to aluminum substrate after coating, rather than simply physical adsorption. It can obviously improve the bonding strength of aluminum and adhesive bonding interface.

g.Grafted neoprene adhesive

A silane coupling agent γ-aminopropyl triethoxysilane (KH-550) was used to improve the properties of grafted neoprene adhesive. As the ratio of KH-550 to grafted neoprene increased, the solid content increased. Among them, when the concentration is 2% to 5%, the adhesion is better. In addition, the homemade hexamethylenetetramine-isophenol complex was used to prepare FM adhesives with KH-550 and other additives, which has good adhesion to metals, solves the problem of poor metal adhesion of silane adhesives, and improves the adhesion of FM original adhesive solution. KH-550 and tetrabutyl titanate were dissolved in ethanol in a certain proportion, and a new coupling agent was prepared by heating, stirring and reflux, which was used as a crosslinking agent for two-component RT-vulcanized silicone rubber. In the bonding with aluminum, titanium atoms and aluminum atoms could form coordination bonds, and amino atoms could provide hydrogen atoms to form hydrogen bonds, which could greatly improve the bonding strength. At the same time, the coupling agent can also play a role in promoting curing. It can also be used for the modification of water-based polyurethane emulsion adhesive, which has excellent adhesion, water resistance and mechanical properties.

④Environmental protecting

It can cause burns.

(2)KH-551 silane coupling agent

①Name and character

Alias: 3 (trimethoxysilyl) -1-propanamine; KBE 903.

CAS: 13822-56-5.

Colorless transparent liquid

②Chemical formula or molecular formula and structural formula: C6H17NO3Si. Structural formula:

③Physical and chemical properties and quality indicators

④ Main use

It can be used in the following aspects.

a.Amino and ethoxy groups are used for coupling organic polymers and inorganic fillers, respectively, to enhance their bonding properties, improve the mechanical, electrical, water resistance, aging resistance and other properties of the product. It is suitable for mineral filled thermoplastic and thermosetting resins such as phenolic aldehyde, polyester, epoxy, PBT, polyamide, carbonate, etc., which can greatly improve the physical and mechanical properties of wet and dry bending strength, compressive strength, shear strength and wet electrical properties of reinforced plastics, and improve the wettability and dispersion of fillers in polymers. In the casting of resin silica sand, the adhesion of resin silica sand is enhanced, and the strength and moisture resistance of molding sand are improved. In the production of glass fiber cotton and mineral wool, it can be added to phenolic adhesives to improve moisture resistance and compressive resilience.

b.Excellent bonding accelerator for polyurethane, epoxy, nitrile, phenolic adhesives and sealing materials to improve the dispersion of pigments and increase the adhesion to glass, aluminum, iron metals, also suitable for polyurethane, epoxy and acrylic latex coatings.

c.Used for sealing modified waterborne polyurethane, when the amount of KH-551 is 4% to 5%, the modified water polyurethane adhesive has good mechanical properties, water resistance and solvent resistance. It is also used in the synthesis of amino silicone oil and its emulsion.

⑤ Environmental safety

Causes burns and irritation to the eyes and skin.

(3)KH-560 silane coupling agent

Alias: 3 glycidyloxypropyltrimethoxysilane

CAS: 2530-83-8. Colorless transparent liquid body

It is dissolved in water, and a hydrolysis reaction occurs at the same time, which releases methanol. Soluble in alcohol, acetone and most aliphatic esters at normal use levels below 5%. This product is an epoxy functional silane coupling agent.

②Chemical formula or molecular formula and structural formula: C9H20O5Si. Structural formula:

③Physical and chemical properties and quality indicators 

Melting point: <-70℃

Boiling point: 119 ~ 121℃ (266.64Pa)

Flash point: 135℃

Relative density: 1.065 ~ 1.072

Refractive index: 1.428 ~ 1.43.

Main Applications: Widely utilized in adhesives such as epoxy resin, phenolic resin, acrylate, polyurethane, melamine-formaldehyde resin, and unsaturated polyester resin. This product can enhance the adhesion between the resin and the substrate, thereby improving the electrical properties of electronic materials and packaging made of epoxy resin. When employed in epoxy, polysulfide, urethane, and acrylic adhesives, sealants, and fillers, it can enhance the adhesion to glass and metal substrates. In a curing system of a polysulfide sealant based on epoxy resin, it can significantly improve the adhesion and sealing effect. Utilized as a bonding accelerator, when silane KH-560 is treated on the surface of aluminum alloy in a weakly acidic aqueous solution (methanol, water, glacial acetic acid, pH = 5), the silanol groups exhibit the most optimal adsorption on the aluminum alloy surface at 2%. When epoxy adhesives are used, a covalent bond is formed, significantly enhancing the durability of the bond. When 5% of the KH-560 coupling agent is added to phenolic-nitrile adhesives, it can absorb the moisture in the adhesive and at the bonding interface, improving the processing performance, increasing the bonding strength, and enhancing the aging resistance. When the KH-560 silane coupling agent is used as a modifier for calcium carbonate whiskers, the calcium carbonate whiskers modified by KH-560 are employed in soy protein isolate (SPI) adhesives. When the dosage of KH-560 is 4% (mass fraction), the dosage of calcium carbonate whiskers is 2% (mass fraction), and the content of SPI is 10% (mass fraction), the bonding performance and water resistance of the system are optimal. Compared with the unmodified SPI adhesive, the dry shear strength is increased by 28.88%, the post-immersion shear strength is increased by 71.41%, and the wet shear strength is increased by 76.68%. The heat distortion temperature is lower than that of the unmodified SPI adhesive.

⑤ Environmental safety

Harmful in contact with skin. It irritates the eyes and skin.

More, such as: KH-580, KH-590, KH-602, KH-792, etc.,SinograceChemical also has, welcome to consult.